Changeable-speed feed mechanism.



PATENTED JULY 3, 1906.

A. M. DRAKE. OHANGEABLE SPEED FEED MECHANISM.

I APPLICATION FILED JAN. 29, 1906.

4 SHEETS-SHEET 1.

PATENTED JULY 3, 1906.'

Nn. i824,914,

A. DRAKE; v CHANGE-ABL SPEED FEED MECHANISM.

flunwu on FILED JAN. 29, 1906.

4 SHEBTS-SHBET 2.

PATENTED JULY 3, 1905.

A. DRAKE.- CHANGBABLB SPEED FEED MECHANISM.

APPLICATION FILED JAN. 29, L906.

4 SHEETS-SHEET a PATENTED JULY a, 1906.

' .M DRAKE. W GHANGBABLESPBED FEED MECHANISM AiPLIGATION, FILED name, was. -4. SHEETB'8HEBT 4.

awe/ 7219 mm. m

burrs STATES ll? @FFTQE.

ALDEN M. DRAKE, or HARTFORD, CONNECTICUT.

GHANGEABLESPEED Specification of Letters Patent.

E23 itiEGHANi$WL Patented July 3, 1906.

Application filed January 29,1906. Serial No. $8,367,

The object of the. invention is to provide a simple self-contained mechanism which can be readily applied to any common form of screw-cutting lathe or similar machine hav ing a cutting-tool the rate of feed of which it is desirable to frequently change, which mechanism is constructed of simple parts that drive positively and directly with a minimum amount of friction and wear thus economizing power and insuring long ife and accuratework, and which is so arranged that without danger of jamming or injuring any of the parts it can be instantly set to obtain any one of a large number of difi'erent speeds by the simple movement of a handle.

Figure l of the accompanying drawings shows a side elevation 0i thehead of a screwcutting lathe provided with a changeablespeed feed mechanism which embodies this invention. Fig. 2 shows an end elevation of the same. Fig. 3 shows a section taken through the changeable/iced gearing on the plane indicated by the dotted line 8 3 on Fig. Fig. 4 shows a section of the gearing on the plane indicated by the dotted line 4 4 on Fig. 2. Fig. 5 shows an end view of the gearing represented in Fig. 4. Fig. 6 shows a horizontal section on the plane indicated by the dotted line 6 6 on Fig. 2. Fig. 7 shows a vertical section on the plane indicated by the dotted line 7 7 on Fig. 1.

The changeablespeed feed mechanism is illustrated in the drawings in connection with the spindle-driving .mechanism of an ordinary screu=cutting lathe. In this mechanism. the spindle 8 is supported by ordinary bear ings in the head 9 and carries a common cone pulley 10, pinion 11, and gear 12, which are utilized to drive the spindle either directly or through the gears on the back gearing-shaft 13 in the usual manner. Keyed to the spindle is a gear 14, which meshes with a gear 15, that is in mesh with a gear 16 on the arbor of the gear 17, that is supported by theset-out stud 18 in the usual i'nanner, Figs. 1 and The gear 17:1neshes with a gear 19, that is keyed to the hub of a gear 20, which is mount ed to turn on a stud 21, that 18 held by a gearbox 22, that isclamped upon a bushing 23,

which is fastened in the end of a gear-box 24.

, The gear 19 meshes with a gear 25, and the gear 20 meshes with a gear 26, so that-the rotation of the gear 17 through the gears 19 and 20 rotates both the gears 25and 2%; in the same direction. In the mechanism shown the gears 19 and 25 are designed with a ratio of two to one and the gears 20 andtfi are designed with a ratio of one to two. The gears 25 and 26 are loosely mounted on the lon hub 27.0f a gear 28. This hub is supporte by the bushing 23, and keyed toit are gears 29 and 30. In the outer end of the hub 27 is a key 31, that is hinged to the movablestud Nhen this stud is'pushed in, as shown in Fig. 3, the gear 26 is keyed to the hub. Then thegears 28, 29, and 30 Wiil be rotated by the gears 26 and 20, at the rate of due to two. When the stud is pulled out,-the key connects the gear 25 with the hub, so that the gears 28 29, and 30 will ben'otated by the gears 25 and l9 at the rate of two to one. Thus by pushing in or pulling out the stud 32 two different relative speeds may be obtained between the set-out-stud spindle-gear 17 and the gears 28, 29, and 30 on the hub 27, Fig. 3. The gears 28, 39-, and 30 mesh with gears 33, 34, and 35, which are loosely mounted on a shaft 36, Fig. 4. in this shaft is a key 37', that is adapted to be moved by a'han(lle-levcr 38, that extends upwardly through a gearbox, so as to connect either the gear 33, 34, or 35 with the shaft. The gears 22 and 33 are proportioned one to two, the gears 29 and 3e are proportioned one to one, and the gears 30 and 35 are proportioned two to one, so that by moving the handle 38 and changing the key three diilerent relative speeds may be obtained between the hub 27 and the shaft 36.

Keyed to the shaft '36 is a gear 39, which meshes with a gear 4.6, the hub of which is supported by a bushing 41, that is set into a long leeve mounted in the lower part of the car-case 24, Fig. Movablebackandtorthinand rotarilysupported by the interior wall of the long sleeve is a cylindrical carrier 43, which supports a spindle 44, that extends through and is connected by a feat-her with the hub of the gear -10, Fig. 3. Held against movement sidewise by the carrier, but having a free rotation therein, is a gear 45, that is keyed to t ii'b spindle $4. The cylindrical carrier asi-it.

seems i :moves back and forth in the sleeve takes the I locatedit is clal'nped to the main gear-box, so

gear with it, and whatever the position of the gear -15 its spindle is always connected with and ready to be driven by the gear l0.

46, which carries a gear 47, that meshes with the gear 45, which is held by .the carrier. I

Extending outwardly from the 4:8,provided ,with a handle 49, that is ad p ed to be thrust toward thegear-box b sprin 50, so itsinnerend will project int done of the'series of holes5j1-QEJ llfhe'n the handle is pulled out and dropped down,- 'ita-can be moved so as to carry the framea'nd'the car rier with the gears 45 and 47 toany desired position longitudinally of the sleeve. hen the handle is moved to the desired locality, it can be-lifted so the spring will force its end into one of the holes and keep it from further movement. 1 mam correctly located. 2 5

This requires the gear 47300 re- Keyed to the shaft 52, that has one 'end supported by a bushing 53 in the. gear-box and the other end supported by the hub 27 inside of the gear-box,

are gears-'54, 55, 56,57, 58, 59, 60, 61, and 62.

,Keyed to the outer end of the shaft 52 is a gear 63, that meshes with a gear 64, which is keyed to the end of the lead-screw shaft 65. By means of the handle the carrier may be moved back and forth in the interior of the sleeve until the gears 45 and 47 are opposite either of the gears 54, 55, 56, 57, 58, 59, 60, 61, or 62, and then by oscillating thehandle the gear 47, which meshes with the gear 45, may be made to mesh with. the gear which it is opposite.

On the inside-of the gear-box, above the upper edge of the opening through which the arm' 48 passes, is arack 66, and on the edge of the :a' 'm is a lug 67, which when. the gear 47 i'esh with any of the cone-gears enters one f'the openings of the rack, Figs. 6 and 7. ll'il 'order to move the frame and carrier, the handle must be drawn out until its inner end is disengaged from one of the holes in the gear-box and must be dropped until the lug 1s disengaged from the rack.

Then the car- Which is driven by the gear 3?) ontlie shat t 36.. ,Pro ectmg outwardly from the cylindrical 1 Garner through a slot in the sleeve is a frame still further multiplied. amethrough an opening in the gear-box is an a n1" tle wear.

as tokeep its position.

. .By changing the position of the handle 49 a j number of initial changes for the rotatlon ,of the lead-screw maybe obtained. By f moving the handle 38 these initial changes maybe mult1phed correspondingly, and by changing the stud 32 these changes may be If the gear 19 is inside to engage with the change-gear system of a common lathe, still further multiplications of the variations can be obtained.

All of the parts are simple to make. The cylindrical carrier has a long bearing in the interior of the sleeve, so that itwill moveback and forth easily and accurately with but lit There are no beltsor friction d evices in this mechanism. All of the drives are positively accomplished by direct gearing. The end gear-box can be swiveled to any desired position on the bushing which supports it. bearing in the hub, and as both travel in the same direction the surface speed, and consequently the friction, is much reduced. The whole device is compact and easily applied to any common form of machine the rate of The change-gear shaft 52has along class, in combination with a cone of gears, a. I o 5 gears.

rier and gear 47 can be moved longitudinally. The frame cannot be hfted for engaging the gears until the lug is opposite one of the rackopenings, and as a result of this the gear 4? of any ordinary machine-tool by securing the 2 In a mechanism of the within-described class, in combination with a cone of gears, a fixed. sleeve located adjacent thereto and parallel therewith, a carrier supported by and 3 movable longitudinally and rotarily thereoannot be engaged with any two of the cone- 111, a gear movable longitudinally with the, carrier within the sleeve, and a gear movable longitudinally with the carrier without the mav be connected with the feed mechanism main gez'ir-box to the bed, so that the gear 63 will mesh with the gear 64 on the lead-screw shaft, and then turmng around the end gearbox until the gear 19, which it contains,

meshes with the gear 17 on the set-out-stnd shalt. After the end gear-box is properly sleeve and in constant mesh with the carriergear and adapted to be meshed with either of'the cone-gears.

3. In a mechanism of the within-described class, in combination with a cone of gears, a sleeve located adjacent thereto and parallel therewith, a carrier supported by and movable longitudinallv therein, a gear movable r 0 seems longitudinally #ith the carrier within the sleeve, a frame movable longitudinally wit-h the carrier, and a g at sup rted by the frame and in constant mesh with the carriergear and adapted to be carried by the frame into mesh with either of the cone-gears.

4. In a mechanism of the within-described class, in combination with a cone of gears, a- -longit-udinall v-slot-ted sleeve located adjacent thereto and parallel therewith, a carrier supported by and movable longitudinally Within the sleeve, a gear movable longitudi f" nallv 'ith the carrier within the sleeve, a frame connected to the carrier and extending through. the slot in the sleeve, and a gear sup-' ported by the frame without the sleeve and in constant mesh with the carrier-gear and adapted to be meshed with either of the conegea' ln a mechanism ot the within-described class, in combination with a cone of gears, 1v sleeve located adjacent thereto and parallel with, carrier supported by and movable longitndinallv therein, a shaft movable 2 5 longitudinally with the carrier, :1 gear on said shaft and movable with the carrier within the sleeve, a gear movable longitudinally with the carrier without the sleeve and in constant mesh with the carrier-gear and adapted to be 0 --meshed with either of the conegears.

-, 6. ln mechanism of the within-described class, in combination with a cone of gears, a "sleeve located adjacent thereto and parallel therewith, a gear supported by and movable 5 longitudinally therein, a frame extending outwardly from the carrier, a gear supported b the frame withoutthe sleeve and in con- I stant mesh with the carriengear and adapted to be meshed with either of the cone-gears, a handle for moving the frame, a lug projecting from the frame, and e fixed rack arra nged to receive the lug and re, ster the frame and the gear which it carries. 7. In a mechanism of the within-described 4 5 class, in combination with acone of gears, a sleeve located adjacent thereto and parallel therewith, a.- ca-rri'er supported by and movable longitudinally therein, av gear movable longitudinally with the carrier within the so sleeve, 9, frame connected to and movable longitudinally with the carrier, a gear supported by the frame without. the sleeve and in 0" stent mesh with the carrier-gear and ads p o L0 be meshed with either of the conegears, a handle tor movin the frame, and a spring for causing the handle to engage registering-hole and correctl vyposition. the trame and the gear which it carries.

In mechanism of the within-described class, in combination with a lead-screw shaft,

a driving-shalt, gears connecting the drivingshaft and the lea-dscrew shaft, a cone of gears keyed to the driving-shaft, a sleeve located'acljacent to and parallel with the cone,

6 5 a carrier supported by and movable longitu git-udinally with the carrier within the sleeve, and a gear movablelongitudinally mesh with the carrier-gear and adapted to be, meshed with either of the cone-gears.

dinallv therein, a shaft movable longitudisleeve, a gear movable longitudinally within the carrier 'ltllljlllt lht sleeve and in constant mesh with the carrier-gear, and a gear splined, to the longitudinallv-movable shat t.

10. In a mechanism of the within delongitu'dinallv within the sleeve, a shaft movsaid. shalt and movable with the carrier within the sleeve, a gear movable longitudinally.- with the carrier without the sleeve and in constant mesh with the carrier-gear, a shaft, parallel therewith, agear splined to the longitudinally-movable shalt, a gear on the parallel shaft meshing therewith, gears of different diameters loose on the parallel shaft, and a key movable in the latter shaft and adapted to connect either of the gears thereto.

11. In amechanism of' the within -described class in combination with a sleeve, a carrier supported b and 'n'iovable'longitw dinallv therein, ashaft movable-lo1witudi na-lly with the carrier, a gear on saio shaft and movable with the carrier -within the sleeve, a gear movable longitudinally with: the carrier without the sleeve and in constant mesh with the carrier-gear, a gear spline-d to the longitudinally-movable shaft,a. shaft parallel with the longitudinallv-movable shaft, gears connecting the parallel shaft with the gear splined on the longitudinallymovable shaft, gears of different diameters loosely mounted on the parallel shaft, a key movable in the shaft and adapted to connect either of the gears with the shaft, a hub, and gears of different diameters secured to the hub and meshing with the gears loose on the key-shaft.

12. In amechanism of the within described class in combination with a sleeve, a carrier supported by and. movable lon itudinallv therein, a shaft movable longitudinally with the carrier, agear on said shaftand move able with the carrier within the sleeve, a gear movable longitudinally with the carrier without the sleeve and in constant mesh with the carrier-gear, ashaft parallel with the longitudine-11y movable shaft, gears connecting these shafts, gears of dillerent diameters loose on the parallel shaft, a key movable in the parallel shaft and adapted to connect either of the gears thereto, a hub,

dinallv within the sleeve, a gear: movable 10h scribed class in combination with a slotted sleeve, a carrier supported by and movable able lon itudinallv with the carrier, a gear on with the. carrier without the sleeve andm constant;

9. In amechanism of the within-described class, in combination with a slottedsleeve, acarrier supported by and movable longitu- Y 7 5 nallv with the carrier, a gearqonsaid shaft, and movable with the carrier within the IIO gears of 1 0 different diameters fast on the hub and mesh- -in with the gears on the key-shaft, gears of gears,'a sleeve, a carriersupported by and movable lon itudinally therein, a shaft movable longitu inally with the carrier, a gear on said shaft and movable with the carrier withinthe sleeve, a gear movable longitudinally with the carrier without the sleeve and'in constant mesh with-the carrier-gear, a gear splined to thelongitudinallymovable shaft, a shaft parallel thereto, gears: connecting the parallel shaft with the ear splined on the longitudinally-movable s aft, gears of difierent diameters loose on the parallel shaft, a key movable in the latter shaft andhdapted to connect either of the gears theret'o, gears of different diameters fixed to the same hub meshing with gears on the key-shaft, gears of different diameters loose on said hub, a vkey movable in the huband adapted ,to connect either of the loose gears thereto, gears of different diameters meshing .With said loose gears, and'a driving-gear meshing with one of the latter gears.

r 14. In a mechanism of the within-described class, in combination, a hub having fixed gears of different diameters and loose gears of different diameters adapted to be keyed thereto, a shaft with one end extend ing into and supported by the hub, a cone of gears keyed to the shaft, a sleeve located adjacent to and parallel wihh the cone, a carrier supported by and movable longitudinally withinthe sleeve, ashaft movable longitudinally with the carrier, a gear fixed to said shaft and movable with the carrier within the sleeve, a gear movable longitudinally with the carrier without the sleeve in constant the longitudinallymovable shaft, ashaft parallel with the longitudinally-movable shaft,

a gear keyed to the said shaft and meshing with the gear splined to the longitudinally movable shaft,tgears of different'diameters loose on the parallel shaft, ,a key movable in the parallel shaft and adapted to connect either of the gears thereto, said gears mesh ing with the gears on the hub.

15. In a mechanism of the within-(1e scribed class in combination,'a.-g iear-box, a

shaft in the gear-box, a cone of gearske ed to the shaft,va sleeve, a carrier movable ongitudinally Within the sleeve, a shaft mov able longitudinally with the carrier, a gear on said shaft and movable with the carrier within the sleeve, argear movable longitudinally with the carrier Without, the sleeve and l in constant mesh with the carrierear and adapted-t0 be meshed with either oft e conegears, a bushing supported by the box, a hub rotatably mounted in the bushin ears of different diameters fixed on the u loose gears meshing with the gears on the hub, a

movable key adapted to connect these loose gears with 'a shaft, gears connecting this shaftwith the longtudinally-movable shaft,

scribed class, inrombination, a main gear-- a box, a cone of gears and gears for driving the cone-gears at different speeds in the gear-box, and an end gear-box, and gears in the end gear-box for driving the gears within the main gear-box, said end gear-box being rotarIly connected with said main gear-box.

ALDEN M. DRAKE.

I Witnesses: I e

H. vR. WILL IAMs, ETHEL M. LowE. 

